Fix _dispatch_lane_resume crash in RepeatingTimer

[nuno-vieira]

🔗 Issue Links

Resolves https://github.com/GetStream/ios-issues-tracking/issues/676

🎯 Goal

Fixes a crash in RepeatingTimer. The root cause is because of a double resume() call. Although we had protections against this, the reason this still happens very rarely is because this class is called from multiple threads, and so the way to fix it is to make sure the state is accessed in a serial queue.

🧪 Manual Testing Notes

N/A

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change follows zero ⚠️ policy (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (docusaurus, tutorial, CMS)

[sonarcloud]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

47 New issues
0 Security Hotspots
91.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[martinmitrevski]

LGTM ✅ We should also update the changelog.